public Bullet(Player owner, float degree)
{
//Derive data from the owner, since it's obvious that this owner fired the bullet, aka construction call
OwnerName = owner.Name;
PenetratingLevel = owner.PenetratingLevel;
ShrapnelLevel = owner.ShrapnelLevel;
PositionX = owner.PositionX;
PositionY = owner.PositionY;
VelocityX = owner.VelocityX + (float)(Math.Cos(degree) * (owner.VelocityLevel * 100 + 200));
VelocityY = owner.VelocityY + (float)(Math.Sin(degree) * (owner.VelocityLevel * 100 + 200));
Color = Color.White;
Scale = 1;
Lifetime = 1;
Damage = owner.DamageLevel * 5;
IsShrapnel = false;
}
public void AddPlayer(Player player)
{
_players.Add(player);
}
public Shockwave(float xPos, float yPos, int size, Player owner)
{
TimeTilBoom = 0.2f;
PositionX = xPos;
PositionY = yPos;
Radius = 72 * size;
Size = size;
if (owner != null)
{
OwnerName = owner.Name;
}
}
public void AddShockwave(float xPos, float yPos, int size, Player owner)
{
var shockwave = new Shockwave(xPos, yPos, size, owner);
Shockwaves.Add(shockwave);
}
public void AddBullet(Player player)
{
for (int i = 0; i < player.NumberOfMounts + 1; i++)
{
float degree = (float)((((player.Angle - (15f * player.NumberOfMounts / 2) + (15f * i)) - 90) / 180) * Math.PI);
Bullet bullet = new Bullet(player, degree);
Bullets.Add(bullet);
}
}
public void HandleCollision(Player player, int levelWidth, int levelHeight, Random r, float frameDeltaTime)
{
for (int i = 0; i < _asteroidsInCell.Count; i++)
{
var asteroid = _asteroidsInCell[i];
if (asteroid.ToBeRemoved || player.IsDead || asteroid.Phase < 100)
{
//No collision possible
continue;
}
//create variables that'd be easier to read than function calls
float x1 = asteroid.PositionX;
float y1 = asteroid.PositionY;
float x2 = player.PositionX;
float y2 = player.PositionY;
Utility.GetClosestDistance(x1, y1, x2, y2, levelWidth, levelHeight, out x2, out y2);
float v1x = asteroid.VelocityX; //e.FrameDeltaTime is the time between frames, less than 1
float v1y = asteroid.VelocityY;
float v2x = player.VelocityX;
float v2y = player.VelocityY;
//get the position plus velocity
float tx1 = x1 + v1x * frameDeltaTime;
float ty1 = y1 + v1y * frameDeltaTime;
float tx2 = x2 + v2x * frameDeltaTime;
float ty2 = y2 + v2y * frameDeltaTime;
float dx = tx2 - tx1;
float dy = ty2 - ty1;
float dx2 = x2 - x1;
float dy2 = y2 - y1;
float r1 = (float)Math.Sqrt(dx * dx + dy * dy); //Get the distance between centers of asteroids
float r2 = (float)Math.Sqrt(dx2 * dx2 + dy2 * dy2);
if (r1 < (asteroid.Radius + player.ShipSize * 16) && r1 < r2) //Collision!
{
//Calculate the impulse or change of momentum, or whatever people call it
float rx = dx / r1;
float ry = dy / r1;
float k1 = 2 * player.Mass * (rx * (v2x - v1x) + ry * (v2y - v1y)) / (asteroid.Mass + player.Mass);
float k2 = 2 * asteroid.Mass * (rx * (v1x - v2x) + ry * (v1y - v2y)) / (asteroid.Mass + player.Mass);
//Adjust the velocities
v1x += k1 * rx;
v1y += k1 * ry;
v2x += k2 * rx * (1 - player.InertialLevel * 0.05f);
v2y += k2 * ry * (1 - player.InertialLevel * 0.05f);
//Assign the final value to asteroids
asteroid.VelocityX = v1x;
asteroid.VelocityY = v1y;
float xDiff = Math.Abs(player.VelocityX) - Math.Abs(v2x);
float yDiff = Math.Abs(player.VelocityY) - Math.Abs(v2y);
float amount = (float)Math.Sqrt(xDiff * xDiff + yDiff * yDiff) / 2;
player.Energy -= amount * (1 - (player.HardnessLevel * 0.05f));
if (player.Energy < 0)
{
player.IsDead = true;
}
player.VelocityX = v2x;
player.VelocityY = v2y;
//Deal damage and activate shield for player
player.ShieldAlpha = 1;
}
if (asteroid.AsteroidType == AsteroidType.MAGNETIC && r1 < asteroid.Size * 64) //Within magnetic range
{
var degree = Math.Atan2(ty2 - ty1, tx2 - tx1);
asteroid.VelocityX += (float)(((asteroid.Size * 128) - r1) * Math.Cos(degree) * frameDeltaTime);
asteroid.VelocityY += (float)(((asteroid.Size * 128) - r1) * Math.Sin(degree) * frameDeltaTime);
}
if (asteroid.AsteroidType == AsteroidType.REPULSER && r1 < asteroid.Size * 64)
{
var degree = Math.Atan2(ty2 - ty1, tx2 - tx1);
float repulsingForce = ((asteroid.Size * 96) - r1);
player.VelocityX += (float)(repulsingForce * Math.Cos(degree) * frameDeltaTime * (asteroid.Mass / (float)(asteroid.Mass + player.Mass)));
player.VelocityY += (float)(repulsingForce * Math.Sin(degree) * frameDeltaTime * (asteroid.Mass / (float)(asteroid.Mass + player.Mass)));
asteroid.VelocityX -= (float)(repulsingForce * Math.Cos(degree) * frameDeltaTime * (player.Mass / (float)(asteroid.Mass + player.Mass)));
asteroid.VelocityY -= (float)(repulsingForce * Math.Sin(degree) * frameDeltaTime * (player.Mass / (float)(asteroid.Mass + player.Mass)));
}
if (asteroid.AsteroidType == AsteroidType.GRAVITIC && r1 < asteroid.Size * 64)
{
var degree = Math.Atan2(ty2 - ty1, tx2 - tx1);
float graviticForce = ((asteroid.Size * 96) - r1);
player.VelocityX -= (float)(graviticForce * Math.Cos(degree) * frameDeltaTime * (asteroid.Mass / (float)(asteroid.Mass + player.Mass)));
player.VelocityY -= (float)(graviticForce * Math.Sin(degree) * frameDeltaTime * (asteroid.Mass / (float)(asteroid.Mass + player.Mass)));
asteroid.VelocityX += (float)(graviticForce * Math.Cos(degree) * frameDeltaTime * (player.Mass / (float)(asteroid.Mass + player.Mass)));
asteroid.VelocityY += (float)(graviticForce * Math.Sin(degree) * frameDeltaTime * (player.Mass / (float)(asteroid.Mass + player.Mass)));
}
}
}